This very creative long-exposure photo was taken using a homemade RGB LED torchlight in a disused railway tunnel in Nottinghamshire in the UK by Flickr photographer Chris Thompson. This guy is a “light artist”, a photographer who shoots in the dark. He manipulates light by moving the light source and selectively illuminating parts of a scene while the shutter is open for extended periods of time, so that the image is built up in the camera sensor.